Cover plate glass warping adjustment method, cover plate glass, display module and equipment

Abstract

The invention provides a cover plate glass warping adjusting method, cover plate glass, a display module and equipment, and relates to the technical field of display cover plates, the cover plate glass comprises an anti-dazzle surface, and the method comprises the following steps: determining an etching roughness parameter according to an anti-dazzle parameter of the anti-dazzle surface; and according to the etching roughness parameter, carrying out frosting etching treatment on the non-anti-dazzle surface of the cover plate glass to obtain the adjusted cover plate glass. According to the application, the roughness of the non-anti-dazzle surface of the cover plate glass can be controlled, and by regulating and controlling the roughness, the warping size and direction of the reinforced cover plate glass can be adjusted.

Description

Technical Field

[0001] This application relates to the technical field of display cover plates, and particularly to a method for adjusting the warping of cover glass, cover glass, a display module, and a device. Background Art

[0002] After the surface of CG (Cover Glass) is treated, AG (Anti-Glare Glass) can be obtained. The anti-glare effect of AG glass is achieved through the microscopic uneven structure on the surface. These microscopic structures will amplify the stress non-uniformity during the chemical strengthening process, resulting in a stress difference between the two sides of the cover glass, making the glass present a warped shape. The existing anti-glare treatment process for AG glass has been relatively mature. If the warping of CG is optimized by changing the AG process, its anti-glare performance may be affected. It is necessary to consider various factors such as its optical performance and chemical stability, which requires a large amount of time and resources for material screening and research and development. Therefore, how to optimize the warping of AG glass without changing the existing functions of AG glass has become an urgent problem to be solved. Summary of the Invention

[0003] Embodiments of this application provide a method for adjusting the warping of cover glass, cover glass, a display module, and a device to solve one or more of the above technical problems.

[0004] In a first aspect, embodiments of this application provide a method for adjusting the warping of cover glass. The cover glass includes an anti-glare surface. The method includes: determining an etching roughness parameter according to the anti-glare parameter of the anti-glare surface; performing sandblasting etching treatment on the non-anti-glare surface of the cover glass according to the etching roughness parameter to obtain the adjusted cover glass.

[0005] In a second aspect, embodiments of this application provide a cover glass, including an anti-glare surface and an etched surface, where the etched surface is obtained according to the above method.

[0006] In a third aspect, embodiments of this application provide a display module, including the above cover glass.

[0007] In a fourth aspect, embodiments of this application provide a display device, including the above display module.

[0008] Compared with the related art, this application has the following advantages:

[0009] The present application provides a method for adjusting the warpage of cover glass, cover glass, display module and device. The cover glass includes an anti-glare surface. The method includes: determining an etching roughness parameter according to the anti-glare parameter of the anti-glare surface; performing sandblasting etching treatment on the non-anti-glare surface of the cover glass according to the etching roughness parameter to obtain the adjusted cover glass. According to the embodiments of the present application, the roughness of the non-anti-glare surface of the cover glass can be controlled, and by regulating the roughness, the size and direction of the warpage after chemical strengthening of the cover glass can be adjusted.

[0010] The above description is only an overview of the technical solution of the present application. In order to be able to understand the technical means of the present application more clearly, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features and advantages of the present application more obvious and understandable, the specific embodiments of the present application are specifically exemplified below. Brief Description of the Drawings

[0011] In the drawings, unless otherwise specified, the same reference numerals throughout the several views denote the same or similar components or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings only depict some embodiments in accordance with the present application and should not be regarded as limiting the scope of the present application.

[0012] Figure 1 Shows a flowchart of a method for adjusting the warpage of cover glass provided in an embodiment of the present application;

[0013] Figure 2 Shows a schematic diagram of a warpage direction provided in an embodiment of the present application;

[0014] Figure 3 Shows a schematic diagram of chemical strengthening provided in an embodiment of the present application. Detailed Description of the Embodiments

[0015] In the following, only some exemplary embodiments are simply described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the concept or scope of the present application. Therefore, the drawings and the description are considered to be exemplary in nature and not restrictive.

[0016] To facilitate the understanding of the technical solution of the embodiments of the present application, the related technologies of the embodiments of the present application are described below. The following related technologies can be arbitrarily combined with the technical solution of the embodiments of the present application as an optional solution, and they all belong to the protection scope of the embodiments of the present application.

[0017] With the continuous development of electronic devices, the performance requirements for cover glass are getting higher and higher. AG glass (Anti-Glare Glass), that is, anti-glare glass, is widely used in the cover glass of various electronic devices such as tablet computers and monitors because it can effectively reduce the specular reflection on the glass surface and improve the visibility of display devices in strong light environments. However, during the application process, the warping of the cover glass will be affected after the glass is AG processed.

[0018] AG glass forms a microscopic uneven structure on the glass surface through processes such as chemical etching or physical grinding. For AG glass, due to the existence of microscopic uneven structures on its surface, during chemical strengthening, the ion exchange process proceeds unevenly on these uneven surfaces. The rate and degree of ion exchange will vary between the convex parts and the concave parts. This is because the diffusion paths and speeds of ions are different under different surface geometries. For example, in the convex parts, ion exchange may be relatively fast because the surface area exposed to the molten salt is relatively large and the ion diffusion path is relatively short; while in the concave parts, ion exchange may be hindered to a certain extent and the degree of exchange is relatively low. This uneven ion exchange leads to uneven surface stress distribution, and there are differences in the stress conditions of the two surfaces of CG, resulting in the phenomenon that CG warps, and the direction is warping towards the AG surface (that is, the concave surface is the AG surface and the convex surface is the ink printing surface).

[0019] Based on this, the present application provides a method for adjusting the warping of cover glass, cover glass, display module and device. Through the chemical frosting etching scheme, the roughness of the ink surface is increased to be equivalent to that of the AG surface, and the stress difference caused by the microscopic morphological differences between the two sides of the glass during chemical strengthening is removed, so as to achieve the purpose of reducing warping. In addition, the warping direction and size of the CG glass after strengthening can be adjusted by controlling the roughness of the ink surface, and other properties of the CG are not affected.

[0020] The technical solutions of the present application and how the technical solutions of the present application solve the foregoing technical problems will be described in detail below with specific embodiments. The several specific embodiments listed can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0021] The embodiments of the present application provide a method for adjusting the warping of cover glass. As Figure 1 shown in the flowchart of the method for adjusting the warping of cover glass according to an embodiment of the present application, the method may include:

[0022] Step S101, determining the etching roughness parameter according to the anti-glare parameter of the anti-glare surface.

[0023] In this possible implementation, the cover glass includes an anti-glare surface (AG surface) and a non-anti-glare surface. The anti-glare parameters of the anti-glare surface may include, but are not limited to, the haze parameter and the roughness parameter. Among them, haze is the proportion of the light quantity deviated from the original direction due to scattering in the light transmitted through the glass or other transparent materials to the total transmitted light quantity, which is used to characterize the light scattering ability of the material and is usually expressed as a percentage (%). At low haze, the glass surface scatters less light and the display effect is clearer. At high haze, the glass surface scatters more light and the display effect is softer. The roughness parameter is used to describe the change in the height difference of the microscopic texture of the glass surface, usually in nanometers (nm) or micrometers (μm) as the unit, and is used to characterize the degree of surface unevenness. The size of the roughness determines the light scattering ability and visual effect of the glass surface. At low roughness, the surface is smoother, the light scattering is less, and the displayed content is clearer. At high roughness, the surface texture is more obvious, the light scattering is more, the glare is reduced, but the display clarity may be slightly affected.

[0024] In this possible implementation, when the anti-glare parameters of the anti-glare surface are determined, the etched roughness parameter can be determined based on these known data. The etched roughness parameter is used to describe the roughness of the non-anti-glare surface of the desired cover glass.

[0025] Step S102, perform sandblasting etching treatment on the non-anti-glare surface of the cover glass according to the etched roughness parameter to obtain the adjusted cover glass.

[0026] In this possible implementation, after the etched roughness parameter is determined, the cover glass is subjected to sandblasting etching treatment so that the roughness of the non-glare surface after the sandblasting etching treatment reaches the roughness corresponding to the etched roughness parameter. Furthermore, the roughness of the anti-glare surface and the non-anti-glare surface of the cover glass is close. After the glass is strengthened, there is no obvious difference in the strengthening stress of the two surfaces of the cover glass, and the warping degree is significantly reduced.

[0027] It should be noted that the sandblasting etching treatment is a delicate surface treatment process. Specific textures and patterns are formed on the glass surface through chemical etching agents and masking techniques. The specific steps include preparation work, pattern design and mask production, mask application, etching treatment, mask removal, quality inspection, and post-treatment and packaging. Each step requires precise control and strict operation to ensure that the final product achieves the expected anti-glare effect and decorative effect.

[0028] In this step, by chemically etching the non-AG surface of the AG glass, its surface roughness is changed, and the warping effect brought by the AG surface is offset during strengthening.

[0029] The present application provides a method for adjusting the warping of cover glass. The cover glass includes an anti-glare surface. The method includes: determining an etching roughness parameter according to the anti-glare parameter of the anti-glare surface; performing sandblasting etching treatment on the non-anti-glare surface of the cover glass according to the etching roughness parameter to obtain the adjusted cover glass. According to the embodiments of the present application, the roughness of the non-anti-glare surface of the cover glass can be controlled, and by regulating the roughness, the size and direction of the warping of the cover glass after chemical strengthening can be adjusted.

[0030] In a possible implementation manner, the anti-glare parameter of the anti-glare surface includes the roughness parameter of the anti-glare surface; determining the etching roughness parameter according to the anti-glare parameter of the anti-glare surface can be performed according to the following steps: using the roughness parameter of the anti-glare surface as the etching roughness parameter.

[0031] In this possible implementation manner, the roughness parameter of the anti-glare surface can be directly used as the etching roughness parameter without other processing or calculation, so that the final roughness of the anti-glare surface and the non-anti-glare surface is closer. Taking a 14-inch 0.4T notebook CG as an example, the glass raw material is an overflow method glass raw material. The following Table 1 shows an example of the warping adjustment data of the cover glass when the CG has an AG function:

[0032]

[0033] Table 1

[0034] Table 1 shows that when the AG parameters include a haze of 30% and a roughness of 0.25 μm, the warping after single-sided AG strengthening is +0.30 mm. It can be seen that the degree of warping is relatively large. Referring to Figure 2 the schematic diagram of the warping direction shown, in this case, the cover glass will produce positive warping, that is, Figure 2 the curve shown in the upper half. After designing the etching roughness parameter (shown as the back surface roughness in Table 1) to be 0.25 μm, the back surface of the cover glass is etched. Etching the back surface of the cover glass can cause the cover glass to produce reverse warping. Referring to Figure 2 the curve shown in the lower half.

[0035] According to the data shown in Table 1, by performing a single sandblasting etching treatment on the non-AG surface of the AG CG, the warping generated by the CG during chemical strengthening due to AG treatment can be offset, and at the same time, the roughness of the non-AG surface can be controlled by adjusting the sandblasting etching process of the non-AG surface.

[0036] Considering that in actual use, it may be required that the cover glass can have some other functions in addition to the anti-glare function. Therefore, in a possible implementation manner, when the cover glass further includes a target functional coating, the etching roughness parameter can be determined according to the anti-glare parameter of the anti-glare surface, and the following steps can be performed: determining a first roughness parameter according to the target functional coating; determining the etching roughness parameter according to the first roughness parameter and the roughness parameter of the anti-glare surface.

[0037] In this possible implementation manner, the target function is achieved by adding a coating on the cover glass. The coating added to achieve the target function will affect the warping degree of the cover glass. Therefore, the first roughness parameter can be determined according to the target functional coating, and this first roughness parameter can be used to characterize the influence of the target functional coating on the warping degree of the cover glass. Then, the roughness parameter of the anti-glare surface is adjusted according to the first roughness parameter to obtain the etching roughness parameter.

[0038] In a possible implementation manner, determining the first roughness parameter according to the target functional coating can be performed according to the following steps: determining the second roughness corresponding to different types of target functional coatings respectively; calculating, such as summing, the multiple second roughnesses to obtain the first roughness.

[0039] In a possible implementation manner, the target functional coating includes an anti-reflection coating and / or an anti-fingerprint coating.

[0040] In this possible implementation manner, the AR (Anti-Reflection) function of the CG (Cover Glass) is achieved by adding a special anti-reflection coating (AR coating) on the glass surface. This function can effectively reduce the reflection of light on the glass surface, thereby improving the display effect and visual experience. The anti-reflection coating can reduce the reflection of light on the glass surface and usually can reduce the reflectivity to less than 1% (the reflectivity of ordinary glass is about 4%-8%). By reducing the reflected light, more light can pass through the glass, increasing the light transmittance and improving the brightness and clarity of the picture. The AF (Anti-Fingerprint) function of the CG (Cover Glass) is achieved by adding a special anti-fingerprint coating on the glass surface. This function can effectively reduce the residue of fingerprints and oil stains on the glass surface, thereby keeping the screen clean and beautiful.

[0041] The target functional coating can at least include an anti-reflection coating, an anti-fingerprint coating or include both coatings at the same time. Taking a 14-inch 0.4T notebook CG as an example, the glass raw material is an overflow method glass raw material. The following Table 2 shows an example of the cover glass warping adjustment data when the CG has AG function, AR function and AF function at the same time:

[0042]

[0043] Table 2

[0044] Table 2 shows that when the AG parameters include a haze of 30% and a roughness of 0.25 μm, the warpage after single-sided AG strengthening is +0.30 mm, indicating that the degree of warpage is relatively large. Table 2 also shows that when the cover glass has an AR coating, the warpage after single-sided AG strengthening is +0.50 mm. It can be seen that the AR coating will increase the degree of warpage. After testing, it can be known that the AF coating will also increase the degree of warpage. Therefore, Figure 2 It also shows that when the cover glass has both an AR coating and an AF coating, after designing the etching roughness parameter (shown as the back surface roughness in Table 1) to be 0.45 μm, the back surface of the cover glass is etched. Etching the back surface of the cover glass can cause the cover glass to have reverse warpage. Therefore, the final warpage degree of the cover glass is ±0.05 mm.

[0045] According to the data shown in Table 2, when the CG has AG, AF, and AR functions, it is also possible to offset the warpage generated by AG, AF, and AR, so that the final CG shows a slightly warped state, which is beneficial to the fitting of the CG in the display module. It should be noted that Table 2 shows the warpage adjustment situation when the cover glass has an AG surface, an AR coating, and an AF coating at the same time. In fact, when the cover glass has an AG surface and an AR coating at the same time, or when the cover glass has an AG surface and an AF coating at the same time, the corresponding etching roughness parameters can also be designed to adjust the warpage degree of the cover glass.

[0046] In this step, the roughness can be controlled by controlling the process of etching the non-AG surface, and the warpage after strengthening can be regulated to match the warpage changes brought about by different functional requirements of the CG.

[0047] In a possible implementation manner, according to the etching roughness parameter, sandblasting etching treatment is performed on the non-antiglare surface of the cover glass, which can be executed according to the following steps: controlling the particle size of the sandblasting powder according to the etching roughness parameter; under the conditions of a specified concentration of sandblasting acid solution, a specified temperature, and a specified time, performing sandblasting etching treatment on the non-antiglare surface of the cover glass, so that the roughness difference value between the treated non-antiglare surface and the antiglare surface is less than a preset difference threshold.

[0048] In this possible implementation, considering that the root cause of glass warping is the stress difference caused by the rough surface of the AG side after the CG two surfaces are strengthened, therefore, in the embodiment of the present application, a sandblasting and etching solution is used to perform a sandblasting treatment on the non-AG side of the CG. By controlling the particle size of the sandblasting powder, combined with the concentration of the sandblasting acid solution, etching temperature, and time, the roughness of the ink printing surface is made close to that of the AG side. After the glass is strengthened, there is no obvious stress difference between the two CG surfaces, and the warping degree is significantly reduced. Moreover, the embodiment of the present application can control the roughness of the ink surface. By regulating the roughness, the design of the warping size and direction after CG strengthening can be achieved. At the same time, since the acid solution etching is adopted in the embodiment of the present application, the mechanical properties of the glass will not decrease after the surface roughness increases.

[0049] In the embodiment of the present application, the preset difference threshold can be set according to experience or actual requirements. By making the roughness difference value between the processed non-anti-glare surface and the anti-glare surface less than the preset difference threshold, the roughness difference between the non-anti-glare surface and the anti-glare surface of the cover glass is minimized.

[0050] Corresponding to the application scenario and method of the method provided by the embodiment of the present application, the embodiment of the present application further provides a cover glass, including an anti-glare surface and an etched surface, and the etched surface is obtained according to the above method.

[0051] In the embodiment of the present application, referring to Figure 3 the chemical strengthening schematic diagram shown, the anti-glare surface (AG surface) and the etched surface of the cover glass are shown in the figure. The CG is placed in the toughening solution, and the non-AG surface of the CG is processed to obtain the etched surface.

[0052] In this possible implementation, the cover glass includes an anti-glare surface (AG surface) and a non-anti-glare surface. The anti-glare parameters of the anti-glare surface may include, but are not limited to, the haze parameter and the roughness parameter. Among them, the haze is the proportion of the light quantity that deviates from the original direction due to scattering in the light transmitted through the glass or other transparent materials in the total transmitted light quantity, which is used to characterize the light scattering ability of the material and is usually expressed as a percentage (%). At low haze, the glass surface scatters less light and the display effect is clearer. At high haze, the glass surface scatters more light and the display effect is softer. The roughness parameter is used to describe the height difference change of the microscopic texture of the glass surface, usually in nanometers (nm) or micrometers (μm) as the unit, which is used to characterize the degree of surface unevenness. The size of the roughness determines the light scattering ability and visual effect of the glass surface. At low roughness, the surface is smoother, the light scattering is less, and the displayed content is clearer. At high roughness, the surface texture is more obvious, the light scattering is more, the glare is reduced, but the display clarity may be slightly affected.

[0053] In this possible implementation, when the anti-glare parameters of the anti-glare surface are determined, the etching roughness parameters can be determined based on these known data. The etching roughness parameters are used to describe the roughness of the non-anti-glare surface of the desired cover glass. In one possible implementation, the roughness parameters of the anti-glare surface can be directly used as the etching roughness parameters without any other processing or calculation, so that the final roughness of the anti-glare surface and the non-anti-glare surface is closer.

[0054] In this possible implementation, after the etching roughness parameters are determined, the cover glass is subjected to sandblasting etching treatment so that the non-glare surface after the sandblasting etching treatment reaches the roughness corresponding to the etching roughness parameters. Furthermore, the roughness of the anti-glare surface and the non-anti-glare surface of the cover glass is close. After the glass is strengthened, there is no obvious difference in the strengthening stress of the two surfaces of the CG, and the warpage degree is significantly reduced.

[0055] It should be noted that the sandblasting etching treatment is a delicate surface treatment process that forms specific textures and patterns on the glass surface through chemical etching agents and masking techniques. The specific steps include preparation work, pattern design and mask production, mask application, etching treatment, mask removal, quality inspection, and post-treatment and packaging. Each step requires precise control and strict operation to ensure that the final product achieves the expected anti-glare effect and decorative effect.

[0056] In this step, by chemically etching the non-AG surface of the AG glass, its surface roughness is changed, and the warpage effect brought by the AG surface is offset during strengthening.

[0057] This application provides a cover glass, including an anti-glare surface and an etched surface, and the etched surface is obtained according to the above method. According to the embodiments of this application, the roughness of the non-anti-glare surface of the cover glass can be controlled, and by adjusting the roughness, the size and direction of the warpage of the cover glass after chemical strengthening can be adjusted.

[0058] Considering that in actual use, it may be required that the cover glass can have some other functions in addition to the anti-glare function. In one possible implementation, the cover glass further includes a target function coating.

[0059] In this possible implementation, the target function is achieved by adding a coating on the cover glass. And the coating added to achieve the target function will affect the warpage degree of the cover glass. Therefore, the first roughness parameter can be determined according to the target function coating, and the first roughness parameter can be used to characterize the influence of the target function coating on the warpage degree of the cover glass. Then, the roughness parameters of the anti-glare surface are adjusted according to the first roughness parameter to obtain the etching roughness parameters.

[0060] In a possible implementation, the target functional coating includes an anti-reflection coating and / or an anti-fingerprint coating.

[0061] In this possible implementation, the AR (Anti-Reflection) function of the CG glass (cover glass) is achieved by adding a special anti-reflection coating (AR coating) on the glass surface. This function can effectively reduce the reflection of light on the glass surface, thereby enhancing the display effect and visual experience. The anti-reflection coating can reduce the reflection of light on the glass surface, usually reducing the reflectivity to less than 1% (the reflectivity of ordinary glass is about 4%-8%). By reducing the reflected light, more light can pass through the glass, increasing the light transmittance and enhancing the brightness and clarity of the picture. The AF (Anti-Fingerprint) function of the CG glass (cover glass) is achieved by adding a special anti-fingerprint coating on the glass surface. This function can effectively reduce the residue of fingerprints and oil stains on the glass surface, thereby keeping the screen clean and beautiful.

[0062] The target functional coating may at least include an anti-reflection coating, an anti-fingerprint coating, or both coatings at the same time.

[0063] For the functions of the various structures in each cover glass of the embodiments of the present application, reference may be made to the corresponding descriptions in the above method, and they have the corresponding beneficial effects, which will not be elaborated here.

[0064] The embodiments of the present application provide a display module, including the above cover glass.

[0065] In the embodiments of the present application, a display module may refer to an electronic component for displaying information, and may include one or more display devices and related driving circuits, control circuits, and other auxiliary components. The display module plays a key role in various electronic devices, such as smartphones, tablets, TVs, computer monitors, automotive instrument panels, industrial control panels, etc.

[0066] The embodiments of the present application provide a display device, including the above display module.

[0067] In the embodiments of the present application, the display device may include, but is not limited to, the following devices: smartphones, tablets, TVs, computer monitors, smart watches, automotive instrument panels, industrial control panels, medical devices, and e-readers, etc. The display modules of each display device may vary in terms of size, resolution, touch function, and durability according to their application scenarios and requirements.

[0068] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0069] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, "a plurality" means two or more, unless otherwise specifically defined.

[0070] As described above, it is only an exemplary embodiment of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope recorded in the present application can easily think of various changes or substitutions, and these should all be covered by the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A method for adjusting the warping of cover glass, wherein, The cover glass includes an anti-glare surface, and the method includes: Determining an etching roughness parameter according to the anti-glare parameter of the anti-glare surface; Performing sandblasting etching treatment on the non-anti-glare surface of the cover glass according to the etching roughness parameter to obtain an adjusted cover glass.

2. The method according to claim 1, wherein The anti-glare parameter of the anti-glare surface includes the roughness parameter of the anti-glare surface; determining the etching roughness parameter according to the anti-glare parameter of the anti-glare surface includes: Using the roughness parameter of the anti-glare surface as the etching roughness parameter.

3. The method according to claim 1, wherein, When the cover glass further includes a target functional coating, determining the etching roughness parameter according to the anti-glare parameter of the anti-glare surface includes: Determining a first roughness parameter according to the target functional coating; wherein, the first roughness parameter is used to characterize the influence of the target functional coating on the warping degree of the cover glass; Determining the etching roughness parameter according to the first roughness parameter and the roughness parameter of the anti-glare surface.

4. The method according to claim 3, wherein The target functional coating includes an anti-reflection coating and / or an anti-fingerprint coating.

5. The method according to claim 1, wherein, Performing sandblasting etching treatment on the non-anti-glare surface of the cover glass according to the etching roughness parameter includes: Controlling the particle size of the sandblasting powder according to the etching roughness parameter; Under the conditions of a sandblasting acid solution with a specified concentration, a specified temperature, and a specified time, performing sandblasting etching treatment on the non-anti-glare surface of the cover glass so that the roughness difference value between the treated non-anti-glare surface and the anti-glare surface is less than a preset difference threshold.

6. A cover glass, including an anti-glare surface and an etched surface, wherein the etched surface is obtained by the method according to any one of claims 1-5.

7. The cover glass according to claim 6, wherein, It further includes a target functional coating.

8. The cover glass according to claim 7, wherein, The target functional coating includes an anti-reflection coating and / or an anti-fingerprint coating.

9. A display module, including the cover glass according to any one of claims 6-8.

10. A display device, including the display module according to any one of claims 6-8.

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